Improvement in riveting-machines



.I. F. ALLEN.

Biveting Machine.

Patented Oct. 5, 18 75.

UNITE STAT S JOHN F. ALLEN, 'NEW YORK, N. Y.

IMPROVEMEINT IN RlVETlNG-MACHINES.

Specification forming part of Letters Patent lid-T683141, dated October 5, 1875; application filed 7 February; 17, 18,75. i

To all whom it may concern Be it known that I, JOHN F. ALLEN, of New firmly attached to the end of the piston-rod B, and its lower endv is shaped to form a die for the desired shape of the rivet-head. Fig. II represents a side View of this hammer. S

York, in the State of New York, have invented a new and Improved ltiveting-lllaohine, of which the following is a specification:

The nature of my invention consists inthe arrangementof acylinder with suitable valves, operated by the cylinder-piston, with the hammer attached to the [)lSl'JOll-I'Otl. The hammerhead is made to move tight in a suitable guidetube. The lower edge of the piston is made with an inclined surface, so as to open the lower air-passage sooner or later, as may be desired, to correspond with the finish of the rivet-head.

In the accompanying drawing, Figure I represents a longitudinal section of my rivetingmachine embodying my invention.

The other figures will be referred to in the following specification. 1

A is a cylinder, with suitable valves for the admission and exhaustion of the pressure which operates the piston. The motive power I propose to use is compressed air. In the upper and lower ends of the cylinder pins or plugs B B are arranged, acting against levers U C, which act against the valve-rod D, so as to move the valve E to admit and exhaust the pressure at the end of the pistonstroke. These plugs B B are operated by the edges of the piston coming in contact with the same. The valve E may be operated by hand, for which purpose small projections tached to hold the machine, and to the lower cylinder head F is attached a tube, H, and bracket J, which latter is provided with a steady-pin, L, which enters the rivetholes in the boiler'plates, to support the lower end of the machine, and at the same time to regulate and fix its position. Into the tube H another tube, N, is fitted, to which a band, a, provided with a handle or projection, M, is attached. This handle M passes through a circular slot in the tube H, and enables the inner tube N to be turned in any direction desired. P is the hammer, fitting air-tight into the tube N, and provided with projections c on the sides, working in grooves n a in the inside of the tube N, to guide said hammer P, and at the same time allow the hammer to be turned. around with the tube N. This hammer is is the piston, attached to the upper end of the piston-rod R. The upper end of this piston is straight, while on its "lower surfacean inolined surface, m, extending about one-half around its outer circumference, is attached. The piston S, rod R, and hammer P being firmly attached together, while the hammer P is guided and works in grooves n in the inner tube N, the turning of said tube N, by means of its projection or handle M, will cause a corresponding turning around of the piston S, so as to bring any desired point of the inclined surface m in a. line with the plug B in the bot tom of the cylinder, regulating thereby the length of the downward stroke of the piston, and consequently of the hammer P, by opening the lower port sooner or later, as may be desired. to is a small air-hole, passing through the tube N, to admit air into said tube above the hammer-head P, and which said air is, after the hammer has passed said hole win its upward stroke, compressed in the upper part of the tube N, and assists in the downward motion of the hammer, to increase the force of the blow. Into-the bracket J a bolt, T, is firmly attached in such a position as to fit and pass through the rivet-holes in the plates to be riveted. The lower part of this bolt is flattened at u, (see Fig. III, which shows a side view of said bolt,) so as to leave a shoulder, 1', on its end, upon which the head of the holding-on bar W rests. This holding-on bar \V is provided with a head, Q, having an openi11g,'v, to pass over the end of the bolt T, and an oblong opening, '0, fitting on the flattened part c of the bolt T, as well as a suitable recess, 00, for the end of the rivets. (See Fig. IV.)

The machine is placed against or upon the boiler-plates to be riveted, so that the steadypin L and the bolt T pass through the rivetholes, whereby the adjoining rivet-holes come in a line with the center of the machine. A heated rivet is then put through these holes, and the holding-0n bar W attached to the bolt T, pressing against'theendof the'ri'vet. The tube N is then turned, soias to bring the greatest depth, 2, of the inclined surface m in a line with the plug B, when pressureis ad- When circular platesar'e to'befrivetedto g'ether, the steady-pin L' (see-Fig; V)fis"infade with a collar, h, tocorrespond withthedis-r tance of the plates {and the b ot'to'tn of the; bracket J at that-point, and the pin itselfplaced at an angle to fittherivet -holes.

What I--=claim as my invention anddesire to'sccu'reb'y Letters Patent, is- V 1. An improved riveting-machine, consisting -of-a cylin'der,A, with suitable valves, in combination with the piston S, rod R, hammer P,

-guide-tubeN, projecting guide-tube H, bracket J, steady-pin L, fixed bolt T, and the holdingon bar W, the whole being arranged and op- 'eratihg'togethersubstantially as described.

2. The combination of the cylinder A, plugs BB, levers or horns C O, valve E, piston S,

;provided with an inclined surface, m, rod R, hammer P, and tube N, with projection or handle M, substantially in the manner and for'the purpose set forth.

3. The piston S, withan inclined'surface,

'Im, onits under side, in combination with the plug B,fp'ist'on='rod R, tube N, and projection or handle M, arranged and operating in the manner and forth; purpose'specified.

JOHN F. ALLEN.

Witnesses:

HENRY E. ROE'DER, FREDERICK I. KING. 

